uboot-imx

clk: uniphier: move U_BOOT_DRIVER entry to core code

Move U_BOOT_DRIVER() entry from the data file (clk-uniphier-mio.c)
to the core support file (clk-uniphier-core.c) because I do not want
to repeat the driver boilerplate when I add more clock data.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>